Microsoft's Azure AD Connect tool can integrate an on-premises Windows Server Active Directory deployment with Azure Active Directory enabling users to connect to a multitude of SaaS applications, Azure Services and of course Office 365. The following video provides an overview of how the Azure AD Connect tool can enable said services:

Several features are included with Azure AD Connect to provide further Active Directory synchronization customization. One of the many customizations offer is Filtering which provides system administrators the ability to select which Active Directory objects are to be synchronized to Azure AD. The standard enablement of Azure AD enables synchronization of users and groups, however filter invoke limits on can based on Organizational Units (OUs), domains, or other attributes.

This Step-By-Step post will provide guidance on how to enable filtering on an already enabled Azure AD Connect implementation.

Step 1: Disabling the scheduled AD synchronization

On the instance Azure AD Connect is installed on, click the Start Menu and type Task Scheduler then hit enter